how to keep a image as background image full height as modal code example

Example 1: how to fit background image in html

/* To make an Image fit the Screen*/


METHOD - 1

html { 
  background: url(images/yourImage.jpg) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

METHOD - 2

IMP: To make sure that the image covers the whole screen, 
you must apply **height: 100%** to both <html> and <body>:

body, html {
  height: 100%;
}

Example 2: how to set a full size background image in html

<head>
<style>
#example1{
  border: 2px solid black;
  padding: 100px;
  background: url(mountain.jpg);
  background-repeat: no-repeat;
  background-size: 100% 100%;
}
</style>
</head>
<body>
<div id="example1">
</div>
</body>

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